Re: [Pysdl-devel] sprites, mouse cursor

[Pete S. <pe...@vi...>]

Peter Nicolai wrote:
> you mean integrating NumPy into SDL-specific calls or
> something?  It would be nice to use this for
> generative-art type stuff --p


well, i tried porting the SDL demo, XFlame.
this just does the standard fire effect creeping
up the screen.

right now in pysdl, there's no way to go mess with
pixels aside from the get_at and put_at. needless
to say this is extremely slow. even a 200x150 window
of the fire takes a couple seconds each frame.

i've been spending time with Numeric, and it
should be really simple to make some functions
to transfer between surfaces and arrays. once
this is done the fire demo should run swift 
under python. (i would hope)

my current design is to add a few functions to
the surface objects:

  get_array(rect) -> array
  set_array(rect, array)

  get_array_rgb(rect) -> (array, array, array)
  set_array_rgb(array, array, array)

  map_rgb_array(array, array, array) -> array

they should be pretty common sense. getting the
surface image data as an array of ints, and also
the ability to get the array as a set of R, G, B
arrays. we'll probably want something for the
alpha as well?

i am interested in hearing people's ideas of how
best to lay this out? perhaps instead of the
set_array style functions you are allowed to pass
an array as a source for blit() and/or create new
surfaces with an array in the constructor?

numeric python has a great C-interface, so it
should hook into pysdl really easily as well as
be very quick.

need input